This was my work to check for quality of chemicals entering the lab. NMR, MS, IR... And over 15 years I have seen dozens and dozens of cases. Now most labs call

This was my work to check for quality of chemicals entering the lab. NMR, MS, IR... And over 15 years I have seen dozens and dozens of cases. Now most labs call HPLC with UV sufficient for quality analysis. Lots of things looked "fine" that way that's for sure. Note that I was in the drug discovery world not in the inorganic chemistry world where things are ususally of much better quality.